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Question

Identify the nucleosome from the following options.

A
DNA + H2A + H2B + H3 + H4
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B
DNA + H1 + H2 + H3 + H4
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C
DNA + 2 (H2A + H2B + H3 + H4)
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D
DNA + 2 (H1 + H2 + H3 + H4)
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Solution

The correct option is C DNA + 2 (H2A + H2B + H3 + H4)
Eukaryotes store DNA in a well enclosed double-membraned body called the nucleus.
In order to pack DNA properly inside the nucleus, it is coiled around a protein complex known as histone proteins. These proteins are organised to form an octamer unit (composed of 8 molecules) with two units each of H2A, H2B, H3, and H4. DNA along with histone octamer forms the nucleosome.

Two nucleosomes are connected by a stretch of DNA called interbead or linker DNA.
Hence, option c is correct.

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